Represents number of annual installments for debt repayment.

No definition available.

Name:	prch_DebtInstrumentAnnualPrincipalPaymentNumberOfInstallments
Namespace Prefix:	prch_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow to repay the principal amount of long-term debt.

+ References

No definition available.

+ Details

Name:	prch_RepaymentsOfDebtPrincipalAmount
Namespace Prefix:	prch_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of the total principal payments made during the annual reporting period.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=prch_MovingServicesCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Future receivables agreement (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)	Dec. 02, 2020	Nov. 02, 2020 USD ($) installment
Debt Instrument [Line Items]
Promissory note carrying amount	$ 418,083
Moving Services Company [Member]
Debt Instrument [Line Items]
Promissory note	$ 150
Interest rate (stated)		0.38%
Promissory note initial principal balance			$ 750
Promissory note, number of installments \| installment			5